Scribing assembly



26, 1952 2. ISRAEL SCRIBING ASSEMBLY Filed Feb. 9, 1951 INVENTORI fm aHIS ATTY'S Patented Aug. 26, 1952 UNITED STATES PATENT OFFICE SCRIBINGASSEMBLY ZisujIsrael, Winnipeg, Manitoba, Canada Application February 9,1951,, Serial No. 210,195

3 Claims. l

invention relates to new and useful improvements in scribing assemblies,more particularly to scribing assemblies used in conjunction with eithera conventional straight-edge rule or a set square, an object of myinvention being to provide adevice of the character herewithin describedwhereby a line or mark may be inscribed upon paper, wood, or thelike,with the rule or square "in position thereby eliminating the necessityfor using a, separate vpencilgor scribing implement.

A still further object of my invention is to provide a device of thecharacter herewithin described. in which the scribing assembly can berotated clear of the edge of. the rule or square thereby enabling thelatter tobe used inthe conventional way.

Another object of 'my invention is 'to *provid a .device of thecharacter .herewithin described which includes means for maintaining thescribingassembly parallel with the edges ,of said rule or square duringthe operation thereof.

A further object of my invention is to provide a device of the characterherewithin described which includes an indicating marker projectingrearwardly from the scribing assembly, which marker indicates,,by meansof a conventional measuring indicia engraved upon the rule or squaresurface, the exactpos'itionor-distance that the scribing point, hastravelled thereby permitting a line of a given length to be scribed.

Still another object of my invention is to provide a device of thecharacter herewithin :described which includes an actuating finger grippositioned upon the scribing assembly so that twisting or 'canting ofsaid assembly is eliminated.

A still further 'object of my invention is to provide a device of the'characterherewithin described which iseconomical in manufacture, simplein operation, and otherwise, well suited for the purpose for which it isdesigned.

With the foregoing objects in view, and such other objects andadvantages as will become apparent to those skilled in the art to whichthis invention relates as this specification proceeds, my inventionconsists essentially in the arrangement and construction of parts all ashereinafter more particularly described, reference being had to theaccompanying drawingsinwhich':

Figure 1 is a fragmentary perspective view-of a straight-edge :with 'one"embodiment of "my device in situ thereupon.

Figure 2 is a perspectiveview 10f -a.rset square situ thereupon.

with an alternative embodiment of jmy. device a scribing deviceincorporated therein in order to facilitate the scribing .of linesuponsuch material as paper, wood, or the like. The rnajority of theseprevious devices sufferiromseveral disadvantages the most important ofWhichi that, once incorporated, they interfere withthe normal use of thestraight-edge or set square.

Furthermore, the prior devices, do not include efiicient means forvaryingthepressure upon the scribing point neither do they incorporateefficient sliding actions which will permit ready movement of thescribing assembly along the straight-edge orse'tsquare ,yetat the sametime prevent undesirable cantin in relation to the sliding surface withthe subsequent jamming of the scribing device occurr ng.

My invention overcomes these disadvantages as well as providing ascribing assembly which is adapted for vuse upon either a conventionalstraight-edge or arset square commonly gusedin woodworking and the like.I Proceeding, therefore, todescribe my invention in detail, ;it will jbeseen upon reference .to V the accompanying drawings that I have illstrated :in Figure '1 a str i 1.0 having a front edge H upon which maybe engraved suitable measuring indicia as indicated at '12. The rearedge L3, also engraved with indicia 12" corresponding exactly with theindicia {2 upon the forward edge thereof, isalso provided with anoutstanding portion 14 hearing three recessed apertures l5 within whichthe finger tips of the operator maybe placed in order to steady thestraight-edge during operation ofrmy scribing assembly. v V Q lMyscribing assembly orjblock, collectively designated it includes a baseportion-H and :a hinged portion [8. The base portion 1 comprises asubstantially g-rectangular plate i 9 having a pair of lugs 20upstanding from the upper surface thereof between which is pivoted *forlimited vertical rotation, the aforementioned hinged portion 18, bymeans of pin'2-l.

The scribing block 46 'is adapted to slide longitudinally along theupper surface 22 of the straight-edge re, means being provided upon saidupper surface .to maintain saidnscribin'g block in position and inparallel relationship with the edges H and [3 of the straightedg'e."Themeans mentioned mortise groove 26 but without any ap preciable sideplay therebetween. Further lateral stability is given to the baseportion IT by the incorporation thereupon of a down-turned lip 28]situated upon the rear edge of the plate and slidably bearable againstthe outer edge 29 of the a aforementioned strip 23.

The hinged portion I8 also comprises a substantially rectangular platehinged between lugs 29 as hereinbefore described and being provided witha double-stepped under surface 30 also to provide'lateral stabilitytothe scribing block. The double-stepped under surface includes an upperstep 3| which rests upon (when in the position' shown in Figure '1) theuppersurface 32 of the aforementioned strip 24. The vertical wall of thelowerstep 33 slidably bears against the outer edge 34 of the otherstrip'24 thereby complementing the action of the downturned lip 28 ashere'- inbefore described.

A'scribing p'ointi35i's situated upon' the front end 35 ofthefhirigjediportion and extends downwardly therethrou'gh'and is adaptedto lie adjacent the edge ll'of the'straight-edge, projecting slightlybelow the under surface of the straight-edge sothat it will engage thesurface upon which the straight-edge is resting. This scribing point mayeither take the form of a sharpened steel pin (for use upon wood ormetal) or a lead pencil 'point which may be grasped in a conventionalchuck (not illustrated).

A finger grip 31 projects upwardly from the upper surface of the hingedportion l8 to permit sliding movement of V the scribing block alongthestraight-edge, thi'sgrip .being positioned so that it may control thepressure of the scribing point as well as eliminating any canting of thescribing block Within the mortiseslot 26. In operation,'thestraight-edge is positioned upon the work to be inscribed whereupon thefinger tips are placed within the apertures [5 thus holding thestraight-edge securely in position. The hinged portion [8 of thescribing block is then raised and the scribing block slid along themortise groove 26 to the position at which the scribed line is to becommenced whereupon the hinged portion is lowered to the position shownin Figure 1. a

The scribing block is then moved along the straight-edge by means of theactuating finger grip 31, downward pressure being applied to the hingedportion so that the scribing point marks the material upon which thestraight-edgeis being used. In order to facilitate the accuratemeasurement of the line being scribed, I have pro vided an indicatingmarker 38 extending rearwardly from the down-turned lip 28 and bearingupon the indicia scale I2 provided upon the rear edge of thestraight-edge. As this scale corresponds to the front scale [2, and asthe scribing point is in transverse alignment with the indicating marker38, the indicating marker allows the operatorto inscribe a line or markof a predetermined length.

Proceeding now to describe the alternative embodiment illustrated inFigure 2 of the accompanying drawings, it will be seen that I have showna conventional set square 39, having a stock 40 and a straight-edge 4|situated at right angles thereto.

The straight-edge 4| is provided with a scale 42 upon the front edge 43thereof and a corresponding scale 44 upon therear edge '45 thereof in asimilar manner to the straight-edge hereinbefore described in theprevious embodiment.

My scribing assembly or block collectively designated 45 in thisembodiment, also includes a base portion 41 and a hinged portion 48pivotally secured'for limited vertical rotation between lugs li]upstanding from a. substantially rectangular plate 50 from which theaforementioned base port-ion 41 is formed. A tenon 5| is provided uponthe under surface of plate 50 slideably engageable within a mortisegroovev 52 formed within the straight-edge 42 of the square, it beingunderstood thatthe dimensionsof the tenon and mortise groove are such asto permit easy sliding movement without undesirable sideplay existing.

The hinged portion'48 comprises a substantially rectangular platehingedas aforesaid and is provided with a pair of scribing points 53extending downwardly therefromTadjacent the front edge :33 of thestraight-edge in a similar manner to the scribing point 35 hereinbeforedescribed.

A finger grip 54 upstands from the hinged portion and enablestheoperatorto slide'the scribing assembly. alon -the straight-edge and to enablethe operator to supply sufficient pressure to the scribing 'po'ints' 53to'cause them to inscribe a line on the surface of the work upon whichthe set square is being used.

The operation or this embodiment is similar to that hereinbeforedescribed but it will be noted that, when utilizedwith 'a set square,the two scribing points 53 provided permit the inscribed line tocommence substantially adjacent the butt end 55 of the square, animportant consideration when the device is being used in wood or metalworking, An indicating marker 56 is also provided extending from "therear edge of the base portion 55 which acts in 'asimi'lar manner to themarker 38 hereinbeforeidesc'ribed. I

' In conclusion, it willfbe, 'een that'I have provided stops 5'! at theextremities. of the straightedge in order to prevent undesirabledisplacement of the scribing block th'erefrom.

Since various modifications can be made in my invention as hereina bovedescribed, and many apparently widely different embodiments of same madewithin the spirit and scope of the claims without departing from suchspirit and scope, it is intended that allmattercontained in theaccompanying specificationshall beinterpreted as illustrative. onlyandnot in ;a limiting sense.

What I claim as my: invention is a 1. An assembly forthe inscribing oflines on material such as paper, wood or the 'like comprising incombination a straight-edge, a scribing block slideably engageable uponthe upper surface of said straightriedge, meansupon said upper surface;tov maintain said scribing block in parallel relatiflnship with thesidesof and outwardly to form, with said upper surface, a mortise groove, atenon formed upon the underside of said base portion slideablyengageable with said groove, said floase lportion comprising asubstantially rectangular plate, :a down-turned lip upon the rear edgeof said plate slideably bearable against the outer edge of one of saidstrips, said hinged portion being pivotally secured to said baseportion, the underside of said hinged portion being double-stepped, thevertical wall of the lower of said steps being slideably lbearableagainst the outer edge of the other of said strips.

2. An assembly for the inscribing of lines on material such as paper,wood or the like, com,- prising in combination a straight-edge, ascribing :block slideably engageable upon the upper surface of saidstraight-edge, means upon said upper surface to maintain said scribingblock in parallel relationship with the sides of said straightedge, saidscribing block including a hinged portion and a base portion, and ascribing point extendin downwardly from said hinged portion adjacent oneof said sides, said hinged l ortion comprising a substantiallyrectangular plate hinged for partial vertical movement to said baseportion, the underside of said hinged portion registering against theupper surface of said straight-edge thereby controlling the depth ofpenetration of said scribing point, said means including a mortisegroove extending longitudinal- 1y along the upper surface of saidstraight-edge and a tenon formed upon the underside of said base portionslideably engageable with said groove.

3. An assembly for the inscribing of lines on material such as lpapenlwood or the like, comprising in combination a straight-edge, a scribingblock slideably engageable upon the upper surface of said straight-edge,meansupon said upper surface to maintain said scribing block in parallelrelationship with the sides of said straight-edge, said scribing blockincluding 'a hinged portion and a lease portion, and a scribing pointextending downwardly from said hinged portion adjacent one of saidsides, said base portion including a substantially rectangular plate,lugs upstanding from said plate between which said hinged portion ispivotally secured, and an indicating marker extending rearwardly from isaid plate adjacent the upper surface of said straight-edge, said meansincluding a mortise groove extending longitudinally along the uppersurface of said straight-edge and a tenon formed upon the underside ofsaid base portion slideably engageable with said groove. 1

ZISU ISRAEL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date Re. 14,788 Waterloo Jan. 6, 1920852,430 Goodman May 7, 1907 1.589310 Waterloo June 22, 1926

